Broken Bow, Part 2: Enterprise is on its first deep space mission when the Suliban kidnap the Klingon they are transporting, forcing Archer to make a detour. [S]
Broken Bow, Part 1: During the first ever episode, the Enterprise crew sets out on its maiden voyage with a mission to return a wounded Klingon to his people. [S]
These Are The Voyages: The crew faces one last mission: to save Commander Shran's kidnapped daughter. An emotional final episode that marks the end of Star Trek as we know it. (S4, ep 22) [S]
In A Mirror Darkly, Part 2: In the mirror universe, Archer commandeers the 23rd-century ship Defiant and uses it in a nefarious power grab. (S4, ep 19) [S]
In A Mirror Darkly, Part 1: The 700th episode of Star Trek sees Archer in a mirror universe, where he mutinies against the captain of an amoral version of the Enterprise crew. (S4, ep 18) [S]
Divergence: With Columbia's help, the Enterprise crew grapples with sabotage as they pursue the truth behind Phlox's kidnapping. James Avery guest stars. (S4, ep 16) [S]
Affliction: Dr Phlox is kidnapped and forced to help the Klingons deal with a grave threat against their species. James Avery (The Fresh Prince Of Bel Air) guest stars. (S4, ep 15) [S]
The Aenar: Archer visits Shran's icy homeland to find a species called the Aenar. Are they connected to the marauding destroyer ships in the region? (S4, ep 14) [S]
United: A marauder ship threatens to destabilise the region. Archer has a plan to capture it, but it'll mean unifying the Andorians, Tellarites and Vulcans. (S4, ep 13) [S]
Daedalus: Emory Erickson, Captain Archer's mentor and the man responsible for the transporter, boards Enterprise for a risky experiment. (S4, ep 10) [S]
Kir'shara: Archer, T'Pol and T'Pau attempt to bring the Kir'Shara - an artefact believed to contain Surak's original writings - to the Vulcan capital. (S4, ep 9) [S]
Awakening: Archer and T'Pol encounter the Syrrannites, a radical group hiding in the Vulcan desert, while the NX-01 crew contends with Vulcan power ploys. (S4, ep 8) [S]
The Forge: Earth's embassy on Vulcan is bombed, and the ensuing investigation puts Archer and T'Pol on the trail of a Vulcan religious faction hiding in a treacherous desert. (S4, ep 7) [S]
The Augments: In defiance of their 'father', Arik Soong's Augments devise a heinous plot against the Klingons which will surely lead to war. Guest starring Brent Spiner. (S4, ep 6) [S]
Cold Station 12: Arik Soong leads his band of Augments to a medical facility where hundreds of genetically enhanced embryos are still stored. Is he about to revive them? (S4, ep 5) [S]
Borderland: When genetic supermen left over from the Eugenics Wars hijack a Klingon ship, Archer must rely on their creator, the criminal Arik Soong, to hunt them down. (S4, ep 4) [S]
Home: The crew receive a heroes' welcome after returning to Earth following their year-long mission in the Delphic Expanse. Back on home turf, they take stock in different ways. (S4, ep 3) [S]
Storm Front, Part 2: As the Nazi invasion of the US continues in an altered 1944, Archer and his crew map out their strategy to stop Vosk from building a dangerous time machine. (S4, ep 2) [S]
Storm Front, Part 1: Season four opens with the crew trapped in an alternative 1944 - the Allied forces are losing WWII and the Nazis have invaded the USA (with alien help). [S]
Zero Hour: It's showtime. Captain Archer has tried every trick in the book to thwart the Xindi plot to destroy Earth, but has it all been in vain? Dazzling series three finale. (S3, ep 24) [S]
The Council: As T'Pol and Reed go on a harrowing mission into one of the mysterious metallic Spheres, Archer and Hoshi approach the Xindi Council hoping to make peace. (S3, ep 22) [S]
Azati Prime: Archer sets off on a dangerous mission to destroy the Xindi super weapon before they can use it to eliminate Earth from the galaxy. (S3, ep 18) [S]
Doctor's Orders: The fate of Enterprise is in Dr. Phlox's hands as the rest of the crew must be induced into a coma to survive a trans-dimensional disturbance. (S3, ep 16) [S]
Stratagem: Archer finds himself face-to-face with Degra, the designer of the Xindi superweapon, and tries to trick him into revealing its location. (S3, ep 14) [S]
Proving Ground: An Andorian ship led by Commander Shran arrives in the Delphic Expanse to help Enterprise hone in on the Xindi superweapon. (S3, ep 13) [S]
Carpenter Street: Daniels tells Archer of a new Xindi plot - three reptilians have travelled back in time 150 years to 21st-century Detroit. T'Pol and Archer investigate. (S3, ep 11) [S]
Similitude: When Trip suffers a catastrophic injury, his only hope for survival is a transplant of clone tissue which Phlox grows from one of his exotic creatures. (S3, ep 10) [S]
North Star: When a settlement of humans living a 19th-century western lifestyle is discovered on a Delphic Expanse planet, Archer and crew set out to learn how they got there. (S3, ep 9) [S]
Twilight: A spatial distortion leaves Archer unable to form any new memories. Years into the future, he wakes up and is stunned to learn the outcome of the human-Xindi conflict. (S3, ep 8) [S]
The Shipment: Archer, Reed and Major Hayes infiltrate a Xindi-Sloth industrial colony to learn more about the weapon of mass destruction that will be used against Earth. (S3, ep 7) [S]
Impulse: When Enterprise responds to a distress call from a Vulcan ship stranded in the Delphic Expanse, Archer and his boarding team are attacked by insane zombie-like Vulcans. (S3, ep 5) [S]
Rajiin: The NX-01 moves closer to a showdown with the Xindi when Captain Archer takes on an enigmatic passenger: a beautiful slave named Rajiin. (S3, ep 4) [S]
The Expanse: When aliens launch a devastating attack upon Earth, Archer and his team enter a mysterious and dangerous zone known as the Delphic Expanse in search of the enemy. (S2, ep 26) [S]
Bounty: The penultimate episode sees Archer in the hands of a bounty hunter who intends to turn him over to the Klingons for a substantial reward. (S2, ep 25) [S]
First Flight: While Enterprise is investigating what appears to be a dark matter nebula, Archer receives news that AG Robinson, an old rival, has died. (S2, ep 24) [S]
Regeneration: Earth calls on Enterprise to intercept two renegade cyborgs, but they turn out to be an insidious enemy. Could this be Star Trek's first contact with the Borg? (S2, ep 23) [S]